<template>
    <div class="box">
        <div class="head">
        <span></span>
        <span>练习</span>
        <span>
        </span>
      </div>
    </div>
</template>

<script>
export default {

}
</script>

<style lang="scss" scoped>
.box {
  height:500px;
}
.head {
  width: 100%;
  height: 40px;
  background: white;
  display: flex;
  border-bottom: 1px solid #f4f4f4;
  span {
    flex: 1;
    text-align: center;
    font-size: 18px;
    line-height: 40px;
  }
}
</style>